Anyone uses the backpack leash for their toddlers? Yay or Nay?

Other moms tell me that this backpack with a leash makes it feel like they are leashing a dog. I'm actually not opposed to this idea as I know children are like Energiser bunnies. They have tons of energy, especially when outside where everything is new and fascinating. Combine that with a crowded environment. I would use this if my baby refuses to hold my hands. This lets her walk around and explore without having to hold hands yet doesn't let her get lost in the crowds. Singapore is still a relatively safe country, but I would like to protect her against potential child traffickers and those with evil intentions towards children. .